Reverberatory furnace



A. N. JETTE.

REVERBERATORY Ij'URNACE. APPLICATION FILED 056.27. 1920.

1,435,304- Patented Nov. 14, .1922.

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REVERBERATORY FURNACE.

vAPPLICATION FILED DEc.21. 1920.

y Patented Nov. 14,1922;

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ARCHIE NOEL JETTE, OF ANACONDA, MONTANA.

REVERBERATORY FURNACE.

Application led December 27, 1920. Serial No. 433,380.

To all wkomz't may concern Be it known that I, ARCHIE Noni. JETTE, a citizen of the United States, residing at Anaconda, in the county of Deerlodge and State of Montana, have invented certain new and useful Improvements in Reverberatory Furnaces, of which the following is a specification. s

The present invention relates to furnaces for the treatment of ores and more particularly to reverberatory furnaces.

. It is the general experience with reverberaj tory furnaces that those portions of the chargefeeding pipes which are lin contact with the furnace proper burn out rapidly because of the intense heat to which they are subjected, making frequent repairs and replacement necessary. It is the main object of this invention to provide a construction'whereby thc'necessity of repairs and replacements is obviated as far as possible and whereby, when repairs are necessary, they can be quickly and cheaply made.

For a full understanding of the inven# tion reference is had to the accompanying drawings in whichl Fig.y 1 is a transverse section of a furnace embodying the invention,

Fig. 2 is a fragmentary sectional View ou a larger scale showing a detail; und

A Figs. 3 and 4 are plan view und elevation of a part form-ing an important part of the invention.

Having reference to Fig. 1, 1() is the bottom, 11 the side wall and 12 the roof of a y usual type of reverberatory furnace, held together against the tremendous influence of heat by side stays 13 interconnected by stress rods or bars 14. i

Above the furnace is a beam construction 15 affording a support for the ore-feeding' system, only a part of the said beam construction being shown.

A plurality of feed pipes are in practice connected with -the furnace throu hout its len h and at both sides thereof. ach pipe inc udes a casting 21 having a nipple 20 ex tending through the roof and a nipple 22, a main pipe 26vleading from a hopper 27 and connected to the nip-ple' 22 by means of a sleeve 25. The sleeve 25' reinforced by a collar 24 loosely surrounds the pipe 26 and the nipple 22 and rests upon a collar 23 on the casting 21.

The nipple 20 is surrounded by a thimble 28 containing Oa coil 29 which has an inlet and an outlet 30 and 31 respectively. At its upper end the thimble28 has a flange 32 forming a seat. The upper portion of the roof is provided with a recess to receive the thimble, the flange 32 resting on thegupper surface of the roof. Y

The nipple may be of cast iron or other suitable heat-resisting material. The inlet and outlet 3Q, 31 may be connected with a circulating system. A cooling fluidpassing through the coil 29 reduces the temperature about the nipple 20 and the casting 28, generally, so that the life of usefulness of the casting is many times longer than it ordinarily would be. It should be understood that the intense heat ordinarily causes considerable stress and movement of the aected parts. These extreme stresses are avoided since the temperature at which the heat is conducted olf as fast as it is transmitted to the nipple 20 is relatively low.

In order, however, to reduce and practically eliminate the reaction of the casting 21 upon the remaining part of the pipe, I may advantageously provide the sleeve 25. Movement of thecasting 21 will cause merely a/sliding ofthe sleeve 25 over pipe 26.

I claim? 1. In a furnace of the type described, the combination with the roof, of a feed pipe eX- tending therethrough and a solid metallic body containing a cooling coil surrounding the pipe.`

' 2. Construction according to claimvl including an expansible section in the feed pipe adjacent the roof. s

3. In a furnace of the type described, the combination with the roof, of a feed pipe extending through the roof including an expansible section adjacent the roof.

4. In a furnace of the type described, the combination with the roof, of a feed conduit comprising a 'nipple passing through the roof, a pipe and a sleeve passing over and and interconnecting the pipe and the nipple,` interconnecting the pipe and the nipple proa, metallic body seated in the roof and c'onvding an expansible connection. tacting With the nipple and a cooling coil 10 5. n a. furnace of the type described, the embedded in the body.- n 5- combination with the roof, of a feed con-` n testimony whereof, Iax illy-signature. duit comprising a nipple extending' through 5. y the roof, a feed pipe, a sleeve passing over p ARCE-HE NOEL JETTE. 

